Recommendation for PSU feeding 4 Shruthis

Hi folks,
for driving my (finished soon) shruthi quartet, I am looking for a psu that is capable to feed all four. Can somebody recommend something, that delivers enough juice and comes with matching connectors?

This should do the trick… Can be set to 7,5v, and should supply up to 2.2amps of power. It’s eco-friendly(ish) too.
You will probably need to reverse the polarity coming out of it(there was a connector included with my 0.6 amp one for that), and buy a 1>4 5.5mm barrel connector splitter/adapter.